I am trying to make a rectangular shape with inner boundary value set as one and outer boundary value set as zero. Ideally a smoother transition from inner boundary to put boundary would be really helpful for my case. Following figure can explain the problem better:
In my implementation, I am struggling with the corners in particular with a linear transition from inner to outer boundary.
Following line should run the function to reproduce the the results of figure 2:
Relevant variable are in the attached mat file.
Looking forward to the feedback.